<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        background-color: #222;
      }
      svg {
        width: 0;
        height: 0;
        display: none;
      }
      .loading {
        position: relative;
        width: 200px;
        height: 200px;
        filter: url(#gooey);
      }
      .loading span {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: block;
        animation: animate 4s ease-in-out infinite;
        animation-delay: calc(0.2s * var(--i));
      }
      .loading span::before {
        content: "";
        position: absolute;
        top: 0;
        left: calc(50% - 20px);
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background: linear-gradient(#d1f5ff, #1683ff);
        box-shadow: 0 0 30px #1683ff;
      }
      @keyframes animate {
        0% {
          transform: rotate(0deg);
        }
        50%,
        100% {
          transform: rotate(360deg);
        }
      }
    </style>
  </head>
  <body>
    <div class="loading">
      <span style="--i: 1"></span>
      <span style="--i: 2"></span>
      <span style="--i: 3"></span>
      <span style="--i: 4"></span>
      <span style="--i: 5"></span>
      <span style="--i: 6"></span>
      <span style="--i: 7"></span>
    </div>
    <svg>
      <filter id="gooey">
        <feGaussianBlur in="SourceGraphic" stdDeviation="10"></feGaussianBlur>
        <feColorMatrix
          values="
          1 0 0 0 0
          0 1 0 0 0
          0 0 1 0 0
          0 0 0 20 -10
        "
        ></feColorMatrix>
      </filter>
    </svg>
  </body>
</html>
